n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 4 |
4 | 12 |
5 | 48 |
6 | 144 |
7 | 576 |
8 | 720 |
9 | 2880 |
10 | 25920 |
11 | 129600 |
12 | 414720 |
13 | 907200 |
14 | 14515200 |
15 | 58060800 |
16 | 130636800 |
17 | 522547200 |
18 | 3265920000 |
19 | 13063680000 |
20 | 22861440000 |
21 | 91445760000 |
22 | 251475840000 |
23 | 1005903360000 |
24 | 16094453760000 |
25 | 64377815040000 |
26 | 81478172160000 |
27 | 1030045040640000 |
[1,2,4,12,48,144,576,720,2880,25920,129600,414720, 907200,14515200,58060800,130636800,522547200, 3265920000,13063680000,22861440000,91445760000, 251475840000,1005903360000,16094453760000, 64377815040000,81478172160000,1030045040640000] |